I did exactly what you are proposing to do! I did it recently (2nd week of January). I went to each property. At the gate I told the guard exactly what I was doing and each one gave me a parking pass and wished me well.

At the front desk they were very polite and made every effort to accommodate me immediately. The only place I waited was Old Key West- they were temporarily short-staffed. All properties acted like this request was a regular occurrance.
I really enjoyed going to each property and experiencing for myself the different feel at each one. The property that surprised me the most was VWL. Prior to going I didn't think I would have much interest in staying there. Wow, I felt like I was in a different world! I had no idea I would like it so much.

If I had not experienced it, I would never have had the desire to stay there. As I was walking the grounds, the pool cast members were assembling the little kids for a rubber duck race. Even though I knew none of the children participating, it was fun to watch.
The reverse happened at AKL. It was very nice, but I expected to like it much more that I did. I think my expectations were too high. I'm not sure why I was disappointed.

We even ate breakfast at Boma and had a nice time.
Good luck,
Lisa